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The cost of DVD players has dropped by $20 each year. If a DVD player cost $189 four years ago, how much does it cost today

The cost of DVD players has dropped by $20 each year. If a DVD player cost $189 four years ago, how much does it cost today
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The cost of DVD players has dropped by $20 each year. If a DVD player cost $189 four years ago, how much does it cost today

User Thomas Dussaut
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it costs $189-(4×$20) which is $189-$80=$109
User Wei Shi
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